Sorry, the recording driver uses audio units rather than any prewrapped AVFoundation objects. But AVFoundation is already linked to your project because FliteController uses it, so it’s easy to experiment with if you have ideas about how to accomplish your goal. There are some AVFoundation objects that are less session-overwhelming than others (for instance, AVFoundation itself is linked to FliteController because AVAudioPlayer coexists with PocketsphinxController’s driver effortlessly as long as no calls to the session are made when setting up the player).